Outside pipe cutter



July 27, 1943.

OUTS IDE PIPE CUTTER Filed June 30,. 1941 C. C. BROWN ET AL 3 Sheets-Sheet 1 Cicero C. Brown J5me; Dan/50ml.

lNVENTOR-S. B

July 27, 1943,

C. C. BROWN ET AL OUTSIDE PIPE CUTTER Filed June 30. 1941 3 Sheets-Sheet 2 Cicer'a Brawn Flo J L. ScoiLJ r.

INVENTORS XW/ Mk July 27, 1943; c. BROWN ET AL I 2,325,104

OUTSIDE PIPE CUTTER Filed June so, 1941 s SheetQ-Sheet s 7 28 z, 48/ a 5/ ii 37 5o 6 E: H I: 7 H 4: 5- 47 1 8 {I 9 37 ii i! I: :I 4 38 l: z :i l I /z /7 I H II 43 131 /6 a 21 /8 22 23 JP 24- CICEIO C, Brawn, James Dm/aomfn '0 L isCOtt, J55 NVENTOR B 9 fiiwzi; k W/ 5 WJW'TORN Patented July 27, 1943 I OUTSIDE PIPE CUTTER' Cicero C. Brown, James R. Dodson, in, and Floyd I L. Scott, 'Jr.', Houston, Tex, assignors, by mesne v assignments, to D. II. Reed Company, Houston, 7 Tex. acorporation'of Texas Y Application June at, 1941, Serial No. 400,492 a 25 Claims. (01. lei-m This invention relates to outside pipe' cutters and has for its general object the provision of a pipe cutter which will constitute an improvement over those heretoforeemployed. i

In previously designed outside pipe cutters various means have'been employed for feeding the cutting knives to the work as the cutting operation progresses. Among -such means is a screw thread type of feed,'such as illustrated in.

the D. H. Reed Patent No. 1,936,643.

It is an object of this invention to provide an outside pipe cutter with a screw type feed which will be more rugged and durable and more efii cient 'in operation than'those heretofore employed. Y 3 I 1 Another object of this invention is to provide such a" device with'anovel and advantageous means for gripping the pipe to be severed.

Another object of this invention is to provide such, a device which may be more easily manufactured than those heretofore employed.

Another object of this invention is to provide a structure which maybe more easily assembled. than similar structures which-have been heretofore designed.

' 'Another object of this invention is to eliminate the use of frangible or easily destructible parts which upon destruction or partial destruction while thedevice is in use may interfere with its continued use or its removal.

Other objects and advantages will become apparent from the following description taken in connection with the accompanying drawings wherein is illustrated one embodiment of this invention. e In the drawings: v V Fig. 1 is aview partly in longitudinal cross section and partly in' side elevation illustrating.

the upper portion of a pipe cutter constructed in accordance with this invention; 1 j Fig. 2 is a view similar to Fig. I but showing the lower portion of the same device, Fig. 2 being a continuation of the lower portion of Fig. 1;

Fig. 3 shows a transverse cross: section'taken along the line 3-3 of'Fig 2; 7

Fig. 4 is a fragmentary elevation of one of the gripping dogs and the mounting therefor which forms a part of this invention;

Fig. 5 is a transverse cross section taken alon the line 5-5 of-Fig. 1;

Fig. 6 is a transverse cross sectiontaken along the line 6-45 of Fig. 2;-

Fig. '7 is a view similar the device in position-surrounding a pipe to be out, the" mechanismhaving *been operated to to Fig; 1 but showing of Fig. '7;

move the cutters a portion of the way through the walls of the pipeto be out; l

Fig. 8 shows a continuation of the lower-portion Fig. 9 is a transverse cross section taken along the line 9 9 of Fig.8;

Fig. 10 is a side elevation ofthat part of the body of the cutter which engages the knives to movethem into cutting position; v Fig. 11 is a sideelevation ofthe complete cutter assembly, parts being "broken away andshown in vertical cross section for purposes of illustration. The outside pipe cutters'to which thisinvention relates are customarily run on the-lower end of a wash overpipe. I having threads 2 'thereonfor the reception of the upper end portionI-of the cutter body 3. This upper part 3 of the cutter body isin accordance with this invention :provided with external threads 4 on its lowerend for the purpose of receiving the upper internally l 5. The sleeve .5- isof threaded end of a sleeve larger internal diameter than the fitting 3 so that the lowerend of the fitting 3 provides an internal downwardly facing shoulder 6. Against this shoulder is seated the upper end of a stop and guard sleeve 'l; This 'sleevehas a flange at the upper end, the upper surface of which engages surface of: which re I the shoulder li and the lower ceives the upper end of the spring 8." This spring;

8. surrounds the relativelythin smaller diameter lower portion of the member 'I and 'rests at its lower end upon theupper' surface ofa slip carrierring 9. The spring 8' is a compression spring and normally urges the slip carrier ring 9 downwardly with respect tothe body of the cutting tool.

However, it" permits upward movement of said ring until the upper surface of the ring comes into engagement with the lower end of the sleeve I, whereupon the sleeve -1 serves as a stop to limit such upward movementffl l s 1 The slip carrierring 9 is formed with'T-shaped slots or notches 'in-its lower edge, as shown at H),

for the reception of'correspondingly shapedends I l of the arms l2 on the lower ends of whicha're integrally formed pipe gripping dogs'or slips l3;

The dogs 13 have circumferentially spaced teeth Mon'their inner surface, these teeth extending upwardlyand inclined outwardly with respect to the axis of the cutting tool. The outer surfaces ofthe dogs 13 areconical beinginclined inward and downwardly toward an apexsubstantially' belowthe lowerends of the dogs, and the opposite side edges of the dogs are taperedtowarcl the.in-

ner surfacesof, the dogs, The do'gsare thus formed.- to fit into slots formed in theupper end portion of the member l6 as shown at I1. These slots have their outer surfaces formed as segofthe slots #1.

. The balls deviceis being. assembled I is-provided a set screw! circumferential 'groove 26' ini'the race member ments of a cone corresponding to the conical outer surfaces of the dogs It, all of the slots l1v having i their outer surfaces formed as segments" of the same cone, however. The cone has its apex at substantial distance below the slots and 'substantially on the faxis ofgthejtool, so that the outer surfaces of all of said slots taper downwardly and inwardly. The side edges or saidslots taper inwardly'toward the central axis of the tool so as to make the slots of dove-tail formation, the taper' on these side edges of the responding substantially to of the dogs. Each slot terminates at its. lower end slots preferably corthat on the sr'deedges operation of the toolby means in an upwardly facing shoulder I8 against which the dogs are adapted to abut downward movement. the dogs l3 are formed so as to limit their so that they will *Cfilll'liiiad-G with the conical surfaces in the slots l1 when i the dogs are at -the lowermosttravel. For this reason. when the dogs grip a pipe the'weight will be taken by the shoulder l 8 and by the entire conical surface of each slip.

2 It will be seen from the foreg'oingthat the slots l1 are of substantially dove-tail formation and that when the rihg' ll is moved'downwardly with respect to the member [6 the. dogs will" be forced; inwardly toward the central axis of the tool by of their contact with the conical outer surtacesot'the slots: t1. 'Thus, the slots 'll in the member [5 willact together to: form an over shotbowl; On upward movement orthe. ring 9 the. dogs will be moved outwardly by-virtue of their contact withthe points of their thus providing a downwardly facing shoulder 21- i against which is received'a balrrace member 22. are adapted to run in the said race member: 22 and also in the race member 2i, which is;. disposed below. the raeemember 22 and'opposed .;.thereto For the purpose of preventing these tworacemembers and the balls 23 from dropping oft of thesleeve-like part H When the or disassembled, there 5&whi-ch engagessin a 24. The: race. member -24 is thus permittedto turn onrthe sleevemember t9 but may not slide ofi ofthe sleeve member. Any other form of securing means may be employed for looldelng the race member 24 in mace on the sleeve'like member 19 while permitting it to rotate- -At'its-lowerendthe. tubular sleeve 5 is interpally threaded W'IZQQQWB aballrace supporting nipplell. .The upperend of this nipple 21 providese shoulder which-engages the lower surface of the ball race. 24, the nipple 21 is externally threadeclat its lower end to receive. the upper endofithemain tubular: body portion- 23 ofsthe cutting tool. -At. its lower end this, i r is internallythreaded toreceive a bottom adapter bushing 29 whose upper end provides an upwardly lacing shoulder .3llwithin the body of the cutting f The tubular body, member 28.15. formed at cir overhanging side edges.

tubular? body portion: 2a

" means.

fand'iof a width to'straddle the cumferentially spaced points somewhat above its lower end with openings to receive the cutter bodies 32 and knives 33, which are carried thereon. These cutter bodies are pivoted at 34 adjacent their lower ends to upper ends of brackets 35 which are in the form of elongated vertical bars that form segments of acyiinder, 'These' bars are 'secured. to the interior of the tubular body'member 28 by means of. screws 36, or any other suitable fastening The knives'are advanced toward and retractedrirom their cutting position during the of a mandrel in thefprm oi' a sleeve 31, WhlChlS provided with slots'38 extending, fromits lower end upwardly knives and knife holders as well as the bars or segmental brackets The conical surfaces on .35. side faces of these slots are formed with grooves which are inclined upwardly and inwardly'toward the axis of the tool from a point adjacent the lower end of each slot. to a'point adjacent upper end as shown at 39, at which point tioe said grooves turn. as shown at 49. The said slots 38 areimadernarrower along thoseportionsr 41 which-lie outwardly from the-said grooves than they arealong the remainingfportions and thegrooves open to the outside surface of; the sleeve 31 at each end o1 the slotfasshown at" and 43 respectively. The inner surfaces oi the narrowed portions form inwardly and; downwardly facing wedge :or cam parts 441 which. serve to engage the lugsli on the knife holders-and movethe knife-holders and. knives inwardly about the pivot 34 as. the. sleeve 31 is moved downwardly with respect thereto It should explained that. theinitial movement of this sleeve downwardly causes the lower endof each of the narrowed portions, to

engage the inclinedsurfaces 46 on the lugs 45 and thus to move the knife holders rapidly inwardly to a point where they are almost ready to begin cutting. Thereupon the long cam surface 44 engages the outermost. portion 45 of such lugs on theknife holders to cause them tomove inwardly more slowly as the cutting proceeds.

Projecting substantially circumferentiall-y from each of the lugs 45. is a. relatively small pin-like portionflwhich is adapted to engage the corresponding groove 33 on. the. side face of the corresponding slot 38. During the time the cut is being made these pins. 41 by engagement with the, grooves 39: prevent th-e knife holders; from teeding inwardly too rapidlyand thus h0gging.. the .cut, ,ahdupon. completion of the inward travel of the knives if the pipe to be severed has not been completely severed, -turther downward movement, will cause these pin-like. portions 41 to, engage the outwardly. extending portions 40 of thesev grooves and in traveling therealong to retract-the blades. from the: work .It will, be noted that the knivescannotbe so retracted from the work during continued downward movement of the member. 31 untilafter they have moved inwardly the maximum distance. Furthermore, it will be noted that theiuatraction of. these knives will not disengagethe 'tool from the pipe upon which it'has-beenoperating because said pipe will still be held by the overshot dogs l3 heretofore described. Theonly purpose-of retracting the knives from the work after the cutters have moved inwardly as far as possible is to prevent the knives from interfering with efforts to remove the tool from-the hole At itsupper end the sleeve or mandrel 31 is P- Yi d i .qc el ere tial s ac d wow 3| which are adaptedabmptly mitwardl y" .ered, any tool in the downward movement of the sleeves ternal threads on this sleeve are right hand threads and are engaged the sleeve-like'part with the threads '28 on IS, so that when one is rotated with respect to the other thesleeve 59 will be elevated or lowered, as the case may be. The interengaging parts 48 and 49 just referred to are secured together in such a manner thatthey move loosely with respect to 'eachother and yet may not separate when rotated substantially with respect to each-other, by means of aband 52 which surrounds the same and which has openings 53. therein to receive loosely screws or any other form of dowel 54 slightly smaller than the opening and carried by the respective pro jections 48 and 49. This ineffectprovides a limited universal joint action between the members3'land5ll." w 1 i In operation, the device is lowered into a hole and over a pipe which is to be severed withthe parts in the positions illustrated in Figs. land 2. As the tool passes down over the pipe to be sevjoints, couplings, or other projections on the outer surface of such pipe will engage the lowerportionsof the dogs i3 and cause them to move upwardlyand outwardly. with respect to the tool'and the pipe to be cut so that they may pass over such projections- .This upward and outward movement by the spring 8 which tends constantly to urge will be opposed the dogs downwardlyand inwardly to thep'osition. illustrated. Immediately upon passing such a projection the dogs will-again be moved to their downward and inward position, which may be termed their gripping position.

.Whenthe point is reached at which. the out is desired-to be made, the toolwill be moved upwardly until the (1025 joint or other projection on the pipe to be severed. A strain will then be taken against the pipe; the dogs gripping the lower edge of the tool joint or the like.

l3 engage beneath a tool a The tool is then rotated toxthe right. This rotation causes a simultaneous rotation of the fitting 3, the tubular member 5, the nipple 2'4, the

. tubular body 28, the brackets 35 and knif holders 32, together with the knives'iifi and thesleeves 3i and 5B. In the meantime the dogs engaging? with the projection on the pipe to be cut will be held against rotation and will in turn serve to prevent rotation of the overshot bowl it together with the sleeve l9. Thus, there will be a rotation to the right of the sleeve 56 while the sleeve i9 is held stationary and this will result through the action of the threads 20 and El As this downward movement cause an inward feeding movement of the'knife holders and knives as heretofore described. When a cut ha s bee'n completed the inward movement of the knives will cease because then the severed section of pipe which is engaged by the dogs l3 will begin to rotate with the tool andthere will no longer be any relative rotation between. the sleeve l9 and the sleeve 50. If the cut is not successfully completed, the device will not release from the-pipe which was to be severed and the only way that the toollcan be removed is by forcibly pulling loose the pipe on which the cut was being made or by. destroyingthe dogs which and a progresses it will and. inward-l movement engage the p ne projection-"entirepipe. J It is further to be noted innconnectionwith the present construction thatithe dogs l3 are car 16 forming whatis This element holds these dogs substantially' rigidly except ffor the ried'jin i'a continuous element called :the overshot bowl: permissibl .upward"- and downwardand outward "above. described. .Whe'n thefitool *haslocked, as at knives,-:-soithat the sleeVeilQ will b compelled to rotate withthe main bodyjofthei tool, this sleeve; asfwell' as; the sleeve 5i) which forces it: to rotate,

are strong and heavy. as compared with correa spending partsof'p'revious constructions,. so that they .will fIlOt give'way in"the,event'of continued. forced rotationof-the tool... This makes-it possible otherwise movableijrelative to said body and anchorable means to. move, said knives; and, .a

rotary feeding connection'gbetween said'anchor able part and said actuator:for:.translating rel'ative rotation oi-said anohorable part and actuator into feeding movement oi.said -actuator with respect to said bodyandanchorable means to cause said actuator to move said *knives when said body is'rotated with respect to said anohorable part I and positively feedsaidknivesinto the pipe during the cutting-operation. f 2. In an outside pipe cutter, a hollow body adapted "to receive a pipe: to 'be out; inwardly movable cutter knives on 3 said body, an anchor engageable. with; said pipe to hold. said 1 anchor against bothv rotary and verticalzmovementg an actuator carriedbysaid body and rotatable there- I I with-while said, anchor is stationary, and otherwise movable with respect to said body to move said; knives. into cuttingposition, and a rotary feeding connection. between said. anchor and actuatorlfor 'translati relativefrotation of said V anchor and actuatorinto feeding .rnovement of I said-actuator with'respectxtosaid body and anchortoicause saidactu'ator to moveand posi tively' if eed said .kni'ves into the pipe whensaid body srotatedwithrespect to said anchor.

3. ,In an outside pipe cutter; a hollow rotatable body, inwardly movable cutter "knives carried thereby an;,anchorablepartadaptedtoremain stationary duringfoperation of the cutter, an actuator; carried-by, saidbody and, movable with respect to saidbody tomove said knives, a-rotary feeding conneotionbetween said anchorable part andsaidactuator to cause said actuator .to move said knives when said actuator is rotated with respect tosaid anchorablegpart, and'means for rotatinggsaid actuator from said body to cause said actuator to-drive saidrotary feeding connection -whereby saic'i actuator will'be moved to 1 feed sa d knives positively'as said body-is rotated first .toa cutting position and thn into the'pipe. ,4. An outside pipe cutter, a hollow body adapted to receive a pipe to be cut, inwardly movable cutter knives onsaid body,;an anchor engageable with saidpipe 'to hold said'anchor against both rotary and, vertical movement,: an actuator car-i or the tool joint or any. other.

e I the. completionof the inward feedingi-and outward retraction of the l movable cutterknives on said body,

longitudinally with said knives into cutting position, and a threaded 'ageable with said'pipe to hold tated with respect toqsaidf anchor.

5. In an outside pipe-cutter, a' hollow "body adapted toreceive a pipe; to be. cut,

engageable with said pipe to hold said anchor against both rotary and vertical movement, an actuator carried by said body and rotatable therewith while said amber is stationary and movable longitudinallyfwith respect to said body to move said knives into cutting position,1.and a rotary feeding connection ,betweemsaid anchor and ace tuator to cause said actuator to move and feed said lmives when said body is rotated with respect to said anchor.- 1 e Y 6. Inan outside adapted to receive Pipe cutter, a hollow body a pine to be cut, inwardly an anchor engageable with saidpipe to hold said anchor against both rotary and vertical movement, an

actuator carried by said body and rotatabletherewith whilesaid anchor is stationarmand movable respect to said body to move connection between said anchor and said actuator .to cause said actuator to move longitudinally with. respect to said body and to feed said knives whensaid' body and actuator-are rotated with respect to said. anchor. v

' 7.. In an outside pipe cutter, a hollow adapted to receive a pipe to be cut, inwardly movable cutter knives on said body, an anchor en gageable with said-pipe? to hold said anchor against both rotary and vertical actuator carried by said body and rotatable therewith while said anchor is: stationary and'movable longitudinally with respect to said body to move said'knives into cutting position, and interen gaging. threaded sleeves non-rotatably carried by said anchor and. said actuator respectively,

whereby when said body and said actuator are rotatedand said anchor is held stationary, said actuator will be caused" to move longitudinally and feed said knives into cuttingposition.

' 8. In an outside adapted to receives. pipe to be cut,'inwardly movablecutter knives on. saidbody, an anchor en- 'said' anchor againstrbothrotary and vertical movement, an

actuator carried by said body and rotatable there with while said anchor'is stationa and movable longitudinally with respect to said body to move said knives into cutting position, means'providing a rotatable feeding connection between said anchorand said actuator to cause s'aid'actuator to move and feed said knives'when said body is rotated with respect to said anchor, and universal joint means betweensaid rotary feedingcone nection andsaid actuator. I

9.-In.an.outsible pipe cutter; a holl'owfbody adapted toreceive a pipe to be cut, inwardly moving cutter knives on said body; an anchor engarceable with saidpipeto hold said-anchor against both rotaryan'd verticalmovement, an actuator carried by said body' and rotatable therewith While said anchoris stationary; and movable longitudinally with respect tosaid body tomove a said knives into cutting position, a

threaded sleeve separatefrom and joined to said actuator by a universal joint, and athreaded inwardly, movable cutter knives on said body, an anchor movement, an

pipe cutter, ahollow body I movable cutter knives on knives, and a rotary feeding 10. In an outside-pipe cutter, a hollow body 1 adapted to receive a pipeto be cut; inwardly moving cutter engageable with said pipe'to hold said. anchor against both rotary and verticalmovement, an actuator carried by said bodyv and rotatable therewith while said. anbhor-isstationary, and movable longitudinally with respect to said body to' move said knives into cutting position, a threaded sleeve, said actuator and sleeve-having: interengaging projections thereommeans Joiningsaid actuator and sleeve together loosely with said projections interengage'd- 'to provide a uni versal joint connection between said actuator and sleeve, and a threaded sleeve carried by said anchor in threaded engagement with saidvfirst mentioned sleeve,.whe'reby upon rotation of said body and said actuator saidifirst mentioned sleevewill be rotated to shift said first mentioned sleeve and said actuator longitudinally with respect to said anchor and saidbo'dyan'd to cause said: knives to move to cutting position.

, 11. In an outside pipe cutter, a hollow body adapted to receive a pipe to be cut, inwardly said body, an anchor comprising an 'ovelsl'io't engageable with said pipe to hold said anchor against both rotary vertical movement with respectto said pipe, said overshot'having'dogs and means for moving said dogs outwardly when they are forceclv-to-move upwardly with respect to' said body, means con-- andsaid actuator to cause said" actuator to move and feed saiclkn'ives when said body'ic rotated: with respect to said anchor. 12. In an outside pipe'cutter, a hollowrota'te able body, inwardly movablecutter-knives car'- ri'ed thereby, ananc'h'orable part adapted to rcmain stationary during operation of the cutter, an actuator rotatable with said body and mov able longitudinally 'oi' said body to move said connection between said body and said anch'ora'ble part for feeding said actuator to cause said cutter tomove: said knives when said body is rotated with respect to said anchorable part,=the means for driving said rotary feeding connection comprising a plurality oicontinuousannular-parts. 1 1 13. In an outside pipe cutter, ahol-low rotatable bod-y, inwardly ried thereby, an anchorable part adapted torernain stationary during operation of thecutter, an actuator rotatable with said body andmow able longitudinally of saiclbody .to-move said knives, and a rotary feeding connection between said body andsaid anchorable part" for feeding said actuator to cause said cutterto move said knives when said body is rotated with respect to part, the means for driving said rotary feeding connection comprising a plurality of continuous annular parts, the means forj'oi n-- ing said anchorabl'e parttd said rotary feeding sleeve on said actuator,[

knives 'on said body, an anchor movable CuttBrkl'liVES cam Lovershot cylindrical member having segmental conicab -slots'formed in its innersurfacathe outermost the axis of said bowl,

, slots respectively,

' lying portions of said slips respectivel to prelower ends in connection comprising aj continuous annular -member. i

14. ,In afdevice. of the character described, an including a slip bowl comprisingiia surfaces of said slots being conical andextendinginwardly and downwardly with respect to and a plurality of slips in said slots respectively, overlying portions of said slips respectivelyto prevent inward movementof-said siipsvwithout corresponding downward movement thereof, (and said overlying parts being inclined outwardly and upwardly whereby on upward movement of said simultaneouslyg l 15. In 'adevice'of the character-described, "an overshotincluding a slip bowl comprising a cylindrical member having-segmental :conical slots formed in its inner surface, the outermost surfaces of said slots beingconical and extending inwardly and downwardly with respect to the axis of said bowl, and aplurality of slips in said slots respectively,

overlying portions of; 'said slips respectively to prevent inward movement of saidslipswit'hout said slots having parts vf said slots having parts wardly and ofsaid bowl, respectively,

portions of said lindrical' member having segmental conical slots formed in it-Sinner surface, the. outermost surfac'eso'f said slots being conicaland extending insaid. slots having v parts overlying ward movement of said slips withoutcorresponding downward movementxthereof; and said overlying? parts being inclined outwardly and 11p- 'war'dly'swhereby-i on upward movement of said 15 slips they will. be forced to move outwardly T multaneously, means for:

slips they will be forced tofmoveroutwardlysilimitin the. downward movement or said slips .and;thereby.limiting the inward movement thereof, and means-for resilientiy urging aid slips downwardl at all times.

'' -19.7111 a device of the character-described,a

' ing slots; therein: the outermost surfaces of which constitute segments of aconeand taper inwardly and downwardlyabetween, the axis of :slipsin said slots, said slips-having teethfthereonj corresponding downward movement thereof, and

said overlying parts being inclined outwardly and upwardly'wherebyon upward movement of said slips they will be forced to move outwardly simultaneously, said slips each having a portion of their outer surfaces conical to coincide with the conical surfaces of the corresponding slot when said slipis at the lowermost point of its travel.

16. In a device of the character described, an overshot including avslip bowl comprising a cylindrical member having segmental conical slots formed in its inner surface, the outermost surfaces of said slots being ccnicaland extending inwardly and, downwardly with respect to the axis of said bowl, and a. plurality of slips in said said slots having parts overvent inward movement of said slips without corresponding downward movement thereof, and

' upwardly they will also beforced to move outsaid overlying parts being inclined; outwardly and upwardly'whereby on upward movement of said sh they will be forced to move outwardlysimultanecusly, said slots terminated at their 17. In a device of the character described, an

overshot including a slip bowl comprising a cylindrical member having segmental conical slots.

formed in its inner surface, the outermost surfaces of said slots being conical and extending inwardly and downwardly with respect to the axis of said bowl, andv a pluralit of slips in said slots respectively, said slots having ing portions of said parts overlyslips respectively to prevent inward movement of said slips without corresponding downward movement thereof, and said overlying parts being inclined outwardly and upwardly whereby on upward movement of said slips they will be forced to move outwardly simultaneously, lower ends in an upwardly facing shoulder and said slips each having a portion of its outer surface conical and I face of the corresponding slot when theslip is in engagement with the upwardly facing shoulder.

18. In a device of overshot including a slip bowl comprising a cyupwardly facing shoulders for lim iting the downward movement of said slips. f

shaped to fit the conical sur-.'

=bowl against downward with "respect to said body; said slip zbowl comment thereof, and said :body, a: slip'bowl withinfsaidbody and rotatable with respect thereto, means for holdings'aid slip longitudinal movement rising a substantially cylindrical member hav said bowl,

disposed in J a vertical plane, whereby when'tsaid :teethare engaged WithanZobject, within. said bowl they will holdsaid bowl against rotation with said body, said bowl having :Dartsover-lyin'g portions of the edgeso-i' said slips'to prevent irrward movement of said slips toward'the axi of said bowl without corresponding downward moveparts being inclined upwardly andoutwardly with respect "to theaxis of said bowl so that when said slips are forced wardly with respect to said bowl.

20. In a device of the characterdescribed, a body, an anchor forholding apart stationary while said body is rotated, said anchor comprising a substantially cylindrical bowl having slots with their outermost surfaces inclined downwardly and inwardly, slips'in said. slots-and means for limiting the downward and inward movement of said slips with respect to said bowl.

21.'In an outside pipe cutter, a hollow body adapted to receive a pipe to be cut, inwardly movable cutter knives on said body, an anchor engageable with saidpipe to hold said anchor.

against both rotary and vertical movement, an actuator carried by with while said anchor is stationary, a'rotary tuator.

- movable cutter knives on said body, an anchor engageable withsaid pipe tov hold said anchor said slots terminating at their 9 the character described, an

, feeding connection between said anchor andaotuator to move said actuator axially of the body upon rotation of the body, and cooperating means on the knives and actuator for positively'feeding the knives into a cutting position and for posi, tively feeding the knives into the pipe during the cutting action upon outside pipe'cutter, a hollow body 22. Inan adapted to receive a pipe'to be cut, inwardly against both rotary and vertical movement, an actuator carried by said bodyand rotatable there-V with while said anchor is stationary, a; rotary feeding connection between said anchor and actuator to move said actuator'axially of the body, upon rotation of the body, and cooperating means on the knives and'actuator for positively feeding the knives into a cutting position at one speed and for positively feedingthe knives i'ntothe pipedownwardlywith respect to the, axis and: aplurality of slip s in said slots slips 'respe'ctivelyi to prevent in said body and rotatable there-.

displacement of the ac- :at a lower speed during the cutti'ngaction upon displacement of theactuaton v a 23.,In an outside pipe cutter, a hollow body adapted to-receive a pipe to be cut, inwardly I movable cu movement of tter knives on said body, an anchor engageable against both rotary and vertical'movement, an actuator carried by said body'land: rotatable therewith while saidanchor is stationary,-a rotary feeding connection between said anchor and actuator to move said actuator axiallyof the body uponrotation. of :the body; cooperating means on the knives and actuator for positively feeding ment of the actuator for retracting the knives item the, pipfih.

24. In an outside pipe: cutter, a hollow body adapted toreceive a. pipe to be out,,inwardly movablecutterknives on v said body, an anchor mgageable' with said pipe to hold said anchor against both rotary-andvertical movement, an

actuator carried by. said body and rotatable therewith while said anchor-is stationazya rotary feeding connection between said anchor and actliator to movesaid actuator axialiy'of the body upon 'mtation'of the body, cam means onthe knives engageablewith the actuator upon initial he actuator for displacing the with said pipe to hold said anchor adapted to receive a movable cutter knives. on said body, an anchor feeding connection during further movement tration thereof.

knives into cutting positiomand-cam means on the actuator engageable with coperating means .on the knives for feeding the knives into the. pipe during further movement of the actuator and during cutting action. 4- V r p 25. vIn an outsidecpipe. cutten-a hollow body pipe to be out. inwardly fpipeto hold saidanchor against both rotaryand vertical movement, an actuator carried bysaid body and rotatable therewith whiie' said anchoris stationary, a rotary ween said, anchor and actuator' to move said actuator axially of the body upon rotationxof the body, camm'eans onthe knives engageable with the actuator upon initial movement of the actuator for" displacingthe knives into cutting position. camnlneana on the actuator en ageable with cooperatingmeans on the lmives for feeding the knives into the pipe of the aotuatorand during cu ing action; other cam means on the actuator, andmeans on the knives cooperating with said other'cam means .for limiting movement of the knives into the pipe and for retracting the knives from the "pipe after limited pene- CICERO 0. BROWN. JAMES R. DQDSON, JR. 1 v FLOYD L, sco'rr, JR. 

